On the non-degeneracy of radial vortex solutions for a coupled Ginzburg-Landau system

Abstract

For the following Ginzburg-Landau system in ${\mathbb R}^2$ \begin{align*} \begin{cases} -\Delta w^+ +\Big[A_+\big(|w^+|^2-{t^+}^2\big)+B\big(|w^-|^2-{t^-}^2\big)\Big]w^+=0, \\[3mm] -\Delta w^- +\Big[A_-\big(|w^-|^2-{t^-}^2\big)+B\big(|w^+|^2-{t^+}^2\big)\Big]w^-=0, \end{cases} \end{align*} with constraints $ A_+, A_->0$, $B<0$, $B^2<A_+A_-$ and $t^+, t^->0$, we will concern its linearized operator ${\mathcal L}$ around the radially symmetric solution $w(x)=(w^+, w^-): {\mathbb R}^2 \rightarrow\mathbb{C}^2$ of degree pair $(1, 1)$ and prove the non-degeneracy result: the kernel of ${\mathcal L}$ is spanned by $\big\{\frac{\partial w}{\partial{x_1}}, \frac{\partial w}{\partial{x_2}}\big\}$ in a natural Hilbert space. As an application of the non-degeneracy result, a solvability theory for the linearized operator ${\mathcal L}$ will be given.